condition mean min max ZT0-3 0.39736807599999996 0.32852693899999996 0.46620921299999996 ZT4-7 0.16802286275 0.050827328 0.2852183975 ZT8-11 0.017208355249999998 0.0 0.034416710499999996 ZT12-15 11.39398534275 6.7407584504999996 16.047212235 ZT16-19 13.1258196955 10.482410416 15.769228975 ZT20-23 12.54956419725 10.103176139 14.9959522555